Solar post cap



FIG. 1 is an isometric view of a solar post cap, incorporating my new design;

FIG. 2 is a side elevational view of a solar post cap, incorporating my new design;

FIG. 3 is a top plan view of a solar post cap, incorporating my new design; and,

FIG. 4 is a bottom plan view of a solar post cap, incorporating my new design. 

The ornamental design for a solar post cap, as shown and described. 